• Metabentonites of the Pirgu Stage (Ashgill, Upper Ordovician) of the East BalticKiipli, Enli; Kallaste, Toivo; Kiipli, TarmoWOGOGOB-2004 : 8th Meeting of the Working Group on the Ordovician Geology of Baltoscandia : May 13-18, 2004, Tallinn and Tartu, Estonia : conference materials : abstracts and field guidebook2004 / p. 53-54 : ill https://artiklid.elnet.ee/record=b2610225*est